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Vulnerability record · CVE-2026-8926 · published 3 July 2026

CVE-2026-8926: Haxx curl insufficiently protected credentials vulnerability

Haxx · Curl

When asking curl to use a `.netrc` file to find credentials and at the same time specifying a URL with a username (without a password), like `https://[email protected]/`, curl could wrongly get and use the password for *another* user set in the `.netrc` file for that host if such a one exists and there is no match for the specified user.

9.1 CVSS 3.1 Critical EPSS 0.44% · top 64.0% CWE-522 · Insufficiently protected credentials
9.1CVSS 3.1 base score
0.44%EPSS exploitation probability, 30 days
NoNot in CISA KEV
1Affected product versions listed by NVD
4References, 2 tagged exploit
15 Sep 2026Last modified by NVD

Description

When asking curl to use a `.netrc` file to find credentials and at the same time specifying a URL with a username (without a password), like `https://[email protected]/`, curl could wrongly get and use the password for *another* user set in the `.netrc` file for that host if such a one exists and there is no match for the specified user.

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N

Affected products

1 vulnerable configurations from NVD's CPE data, grouped by vendor and product.

References

LinkTags
https://curl.se/docs/CVE-2026-8926.html PatchVendor Advisory
https://curl.se/docs/CVE-2026-8926.json Vendor Advisory
https://hackerone.com/reports/3735184 ExploitIssue TrackingThird Party Advisory
https://hackerone.com/reports/3735184 ExploitIssue TrackingThird Party Advisory

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Related vulnerabilities

Same products first, then exploited flaws of the same weakness class.

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Source: NIST National Vulnerability Database (record CVE-2026-8926), CISA KEV, FIRST EPSS (scores of 2026-09-26). This page is refreshed as NVD updates the record.